The arctic oscillation during the winter months can be a very important tool to use to determine when temperatures will get cold and when they will be "warmer." This doesn't work everywhere. As a matter of fact it's only reliable from The Plains to The East Coast.

The more positive the number, the more likely we are to see above normal temperatures. And we'll be seeing that as we go into next week, which is when the green line shifts to the positive category. Yay!

But notice how as we get near Dec. 21 the line starts to trend more negative. And that would line up with our next chance of colder air moving in.

The map above shows the departure from normal temperature. And as you can see there's another surge of arctic air moving out of Canada into The United States around the 20th of this month.

So, another punch of cold air is coming near Christmas where highs are below normal (with normal being in the upper 40s) Enjoy the 50s for next week Oklahoma!

Whether you see sunny skies, raindrops or severe weather, there is an opportunity for a FirstAlert weather photo -- and we've made it easy! Post your weather pic or video to http://ulocal.koco.com, or upload them to ulocal@koco.com.

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